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working on an upgrade from 2.3.5 to 2.3.7 and suddenly got this error when compiling, does anybody know how to fix this?

enter image description here

Looks like it had to do with me changing to "minimum-stability": "dev", because of mageplaza smtp asking for that.

I tried to search for information, did a complete new composer install but still the same error.

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That class only exists since Magento version 2.4.1, it does not exist in any version of 2.3. So, you have to change "minimum-stability" to "stable" to make sure everything works as expected.

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  • I tried that, removed everything again, composer clearcache, composer install etc with "minimum-stability": "stable", but still the same issue :(
    – Sander van Zuidam
    Commented Jan 19, 2023 at 15:51
  • Remove vendor and generated directories and run composer install, then run compile code command again. If it does not work, I think you need to do a composer update, if so -> remove vendor and generated directories and run composer update, then run compile code command again.
    – Tu Van
    Commented Jan 19, 2023 at 15:59
  • Looks like you need to run composer update. To install a package that has minimum-stability is dev, you can whitelist that package with a stability flag instead of the whole project. Take a look at this post stackoverflow.com/questions/28240571/…
    – Tu Van
    Commented Jan 19, 2023 at 16:33
  • Nothing worked, I will just try to upgrade to 2.4.1 and see what happens :)
    – Sander van Zuidam
    Commented Jan 20, 2023 at 8:37

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