SilverStripe 4 - Unable to access the backend [Environment Plesk]

OS Plesk Obsidian Web Pro Edition SilverStripe PHP MariaDB
Ubuntu 20.04.4 LTS v. 18.0.44 v. 4.10 v. 7.4.30 v. 10.3.34

I state it is a clean installation

The frontend works perfectly, instead calling /admin

“Server error there was a problem handling your request.”

Error log extract:
Error 500 GET /Security/login?BackURL=%2Fadmin%2Fpages%2F HTTP/1.0
Warning (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server
Error End of script output before headers: index.php

Has anyone encountered this problem?
Thank you

I made other tests on other environments always plesk and the scenario is similar, in one case the following “Emergency” occurred in the creation of the following table:

Error log extract:
[Emergency] Uncaught SilverStripe\ORM\Connect\DatabaseException: Couldn't run query: 
CREATE TABLE "File" ( "ID" int(11) not null auto_increment
ENGINE=InnoDB Index column size too large. The maximum column size is 767 bytes.
GET /dev/build

Line 64 in /var/www/vhosts/.../vendor/silverstripe/framework/src/ORM/Connect/DBConnector.php

For this I found an explanation in the documentation that might be useful to someone

I have identified the “opcache” cause