MODX dies after installing HybridAuth package

[biz87]

Bug report

Summary

MODX died after installing the HybridAuth package. At least none of the interface elements worked.

Step to reproduce

When installing the HybridAuth package via modx or modxpro, the installation console hangs. Then, after reloading the page, the following "Undefined array key" modUser "in E: \ OpenServer \ domains \ guidenwagen \ core \ vendor \ xpdo \ xpdo \ src \ xPDO \ xPDOMap.php on line 44" will pop up.

Observed behavior

All interface elements stop working. This error is present on all pages of the manager.

Expected behavior

The package should just install

Environment

Nginix_1.21
PHP_8.0
MySQL-5.7

Correction

switch to PHP_7.4