Error opening Studio

Hello, we have migrated to version 7.11.20 and we have noticed that it is not possible to access the Study option, the error that I show in the image appears

and in the log of the page, this error appears

I appreciate if you have any idea to solve it.

Fix the file permissions

sudo chmod -R 755 .

sudo chmod -R 775 cache custom modules themes data upload config_override.php

If it doesn’t work try to disable ajax by adding this line to file config_override.php

$sugar_config['disableAjaxUI'] =true;
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