HTML errors on aalb_impression_generator.php

I found 2 errors on aalb_impression_generator.php

Line 148:
return '<img src="' . $image_url . '" width="1px" height="1px" alt="" style="position: fixed !important; bottom: -1px !important; right: -1px !important; border:none !important; margin:0px !important;" />';

-An img element must have an alt attribute. Please add something.
-Bad value “1px” for attribute “width” and “height”.
Do not write px. We should write this way.
<img src="//example.com/example.png" width="1" height="1">

-Appendix:
I know some people use this plugin via AMP, but AMP doesn’t allow

inline styles

.
I would appreciate if AALB developpers delete inline styles from this aalb_impression_generator.

Also I found another bug. Please visit here:
https://www.ads-software.com/support/topic/error-save-failed-error-writing-contents-to-file/