When I contacted my webhost about this problem this is the email I received from them about it.
I do see quite a bit of warnings in the php.log file:
>
> [11-Jan-2018 12:29:47 UTC] PHP Warning: Invalid argument supplied for
> foreach() in
> /home/cp_erin/colourpop.me/wp-content/plugins/nextgen-
> gallery/products/photocrati_nextgen/modules/nextgen_data/
> pel-0.9.6/class.exif_writer.php
> on line 69
> [11-Jan-2018 19:33:00 UTC] PHP Warning: Invalid argument supplied for
> foreach() in
> /home/cp_erin/colourpop.me/wp-content/plugins/nextgen-
> gallery/products/photocrati_nextgen/modules/nextgen_data/
> pel-0.9.6/class.exif_writer.php
> on line 69
>
> Have you shared the warnings/errors in your php.log to the support team
> at nextgen-gallery to see what may be preventing you from uploading?
>
> There was a fatal error entry in the php.log but it is regarding another
> script:
>
> [05-Jan-2018 07:03:43 UTC] PHP Fatal error: Allowed memory size of
> 94371840 bytes exhausted (tried to allocate 52010112 bytes) in
> /home/cp_erin/colourpop.me/wp-includes/class-phpmailer.php on line 2733
>
> This error can be resolved by changing the default php memory_limit
> through your phprc file:
>
> https://help.dreamhost.com/hc/en-us/articles/214893937-How-
> do-I-increase-the-PHP-memory-limit-
>
> If you’re still having trouble with uploading through your nextgen
> plugin, you may want to inquire with the plugin support and share the
> php.log entries regarding the warning. If they have feedback on changes
> needed on the server-side, please let us know and we’d be happy to take a
> look and see if it can be implemented.
>
> If you have additional information or questions, please reply back at any
> time.
I fixed the memory limit issue I had with the OTHER plugin listed above and it did not fix my nextgen issue. The only other error in my PHP log is this one:
[29-Jan-2018 17:14:52 UTC] PHP Warning: Invalid argument supplied for foreach() in /home/cp_erin/colourpop.me/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_data/pel-0.9.6/class.exif_writer.php on line 69
and that one is the ONE consistent error in my log and it goes back to 12/18/17.
