can't download or install add-ons anymore (package directory already exists)

I can't anymore update, download or install add-ons. A newly bought add-on and also an add-on that is ready for an update both give the same error:

"The directory ......../packages/ already exists. Perhaps this item has already been installed."

I looked in the packages-directory, but I can't see anything strange there: all the sub-directories of previously installed packages appear there as expected. The add-on that is ready for an update has of cours already its sub-directory in /packages/ , so I can't really understand the phrase in the error message "Perhaps this item has already been installed". That doesn't make sense to me for an add-on that wants only to update itself.

Can someone help me out? Thank you!

C5 8.5.5

1 Attachment

hutman replied on at Permalink Reply
I searched this string in the concrete directory code and found it in concrete/src/Updater/Archive.php line 112

It's hard to say exactly what is going wrong, do you by chance have any .zip files in your packages directory?
terano replied on at Permalink Reply 1 Attachment
I don't have any other files than the packages directories (and all their contents within those folders). Also no hidden files there.

I scanned the whole server for any zip files. I found only some zip files in /application/files/tmp/; I deleted them, but that doesn't make a difference.

I changed the log to debug level, but I don't know if these lines indicate errors or if they are just notices.

In the log I see something that I don't understand now:
I have an update to install for the Modena theme.
And I have a freshly bought add-on to download and install (Formidable (Full version)).

When I click "download" for Formidable in Extend Concrete5 / Add Functionality / Awaiting Installation, the log produces also lines where the Modena package is mentionned: "The response code was 200 and the body was [{"url":"https:\/\/\/marketplace\/themes\/modena\/?.............". These lines (and the others in the attached screenshot) appear also when I click the update-button for the Modena theme that is already installed.