We managed to identify the issue

You seem that your module requires a modification of default.aspx, which might have been voerwritten by an upgrade.

It is practically impossible for an administrator of a busy server with many sites and 100s of modules to control changes to core.

Ideally you need to create your module without the need to change core. Having said that it may be difficult considering the lack of DNN support for Localization. Hopefully it is changing soon.

But the spam was coming from the shedualer

That could be something that you can fix

This task is added by the module and not deleted after deleting the module from the portal Delisoft.DNN.Modules.DSLocalizator.DSHACKReminderTask

so it takes a lot of time to search and find the issue in Scheduler

Now that we have deactivated it, the spam stopped.

Salar