Allowed memory size exhausted

[josch87]

Since a couple of weeks it is not possible to open any of the Matomo Analytics backend pages (not even ?page=matomo-about). After a long wait (which paralyzes the entire installation) there is always the following error on a white page with status code 502:

Proxy Error The proxy server received an invalid response from an upstream server. The proxy server could not handle the request

Reason: Error reading from remote server

Updating to the latest versions did not change anything. Currently using:

• WordPress 6.3.1
• Matomo Analytics – Ethische Statistiken. Nachhaltige Erkenntnisse. 4.15.0

Enabling

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );

does not give any information.

One time WordPress sent a mail to the admin mailbox saying:

Ein Fehler vom Typ E_ERROR wurde in der Zeile 445 der Datei /mnt/web312/c3/99/51444199/htdocs/cms/wp-content/plugins/matomo/classes/WpMatomo/Admin/SystemReport.php verursacht. Fehlermeldung: Allowed memory size of 536870912 bytes exhausted (tried to allocate 266338336 bytes)

memory_limit currently at 512M on a Strato Hosting Starter Package which might be the maximum for this hosting.

How much memory limit does Mataomo Analytics WordPress plugin need?

Thank you very much