PHP errors

The script throws the following PHP error, multiple times on the same page (but not one error per image. The error count is less than the image count):

[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:38:51 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:14 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261
[15-May-2020 10:43:22 UTC] PHP Notice:  Array to string conversion in /home/dare2go/public_html/play2/wp-content/plugins/tiled-gallery-carousel-without-jetpack/jetpack-carousel.php on line 261

This is on a staging site!
If you’re interested I could turn on ‘debug’ and test it on my life site too.