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jhowell · 09-30-2021, 10:23 PM

The problem in accessing OverDrive libraries via this plugin is apparently caused by an expired Let's Encrypt certificate used by OverDrive. For some reason an associated expired intermediate certificate has been left behind causing problems with creating a secure connection via Python and therefore calibre under Windows 11.

I was able to resolve this problem on my system by doing the following:

Click in the Windows search box in the task bar and enter certmgr.msc to open the certificate manager for the current user.
In the left panel select Certificates under Intermediate Certification Authorities.
In the right pane scroll down to R3. Double click to open it and note that the Valid from/to dates are both in the past.
Click OK to close the dialog.
Press DEL to delete the R3 entry.
Select YES to confirm deletion.
Close certmgr.

09-30-2021, 10:23 PM	#1139
jhowell Grand Sorcerer Posts: 6,670 Karma: 86234809 Join Date: Nov 2011 Location: Charlottesville, VA Device: Kindles	The problem in accessing OverDrive libraries via this plugin is apparently caused by an expired Let's Encrypt certificate used by OverDrive. For some reason an associated expired intermediate certificate has been left behind causing problems with creating a secure connection via Python and therefore calibre under Windows 11. I was able to resolve this problem on my system by doing the following: Click in the Windows search box in the task bar and enter certmgr.msc to open the certificate manager for the current user. In the left panel select Certificates under Intermediate Certification Authorities. In the right pane scroll down to R3. Double click to open it and note that the Valid from/to dates are both in the past. Click OK to close the dialog. Press DEL to delete the R3 entry. Select YES to confirm deletion. Close certmgr.