Error 001: _mlw_quizzes doesn’t exist

Hello,
i have your plugin without addons installed, but i get the following error, if i trie to make a quiz:

Error 0001 – Table ‘mydatabase.gowp_mlw_quizzes’ doesn’t exist from SHOW FULL COLUMNS FROM gowp_mlw_quizzes

I have found the same problem on this thread (and in others), but there is no soultion:
https://wordpress.org/support/topic/error-code-0001-4/

I use mySQL 8.0.15
PHP 7.3
Wordpress 5.4.1
Only your plugin in Version: 6.4.10
This is no multisite
mySQL uses utf8mb4

Please help me with this problem