Transition from drupal 9.3 to 9.5.10 and mysql 5.7 to 8.1 about droopler HOT 2 OPEN

UPDATE: I realized my failure to also transfer my modules. Now the webform and adjacent errors are gone, but the page doesn't stop loading: I tried increasing memory_limit in php.ini to 512 and max_execution_time to 900, but I still get

if(!Element.prototype.matches){Element.prototype.matches=Element.prototype.msMatchesSelector||Element.prototype.webkitMatchesSelector;} Fatal error: Maximum execution time of 900 seconds exceeded in /opt/drupal/site/web/modules/contrib/advagg/advagg_js_minify/jshrink.inc on line 220

Any clues how to fix this?

This definitely has to do with the database import because launching 8.3.2.0-rc1 with MYSQL 8.0 works fine on a fresh DB and launching my old instance with both MYSQL5.7 and MYSQL8.0 works fine with the same data.

Could there be anything else making advagg stall?

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I fixed this. The trick is to disable jshrink BEFORE exporting the db, otherwise it's going to import the settings for jshrink as enabled and it's going to mess up your site.

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