@csthomas Please see if this shoud be fixed by #15592

Sorry, i do not understand quit well what i have to do to fix the issue.

@csthomas have written a Pull request and @wojsmol is asking him if his PR solve your Issue.

When i do this i receive this error when the page cache plugin is active.
http://fuse.linatango.com

the fix will be delivered in the next joomla update

Thank you! Special for the fast response.

@alikon Thi case os solved by #15592 or other PR?

as @alikon wrote "the fix will be delivered in the next joomla update"

@wojsmol to be honest i'm not sure if #15592 and/or other's ... cause the issue was not so clear
@madesign all merged pull request will be delivered in the next release ;)

Well deactivating the the page cache plugin resolves the problem until Joomla will be updated.

@madesign please let Issue open until @csthomas answered if his PR solve this Issue too or another PR must be written.

Ok i will.
So far i have only one site where the error not appear. http://www.cafetindelsur.de php 7.1.2
Tell me if you like to have any info about my configurations.

This issue here is a duplicate to #15674 . And there it was confirmed that #15592 solves the problem.

As i said, when i delete the storage file i receive an error message. Unable to load storage file. Or do i misunderstand something?

@madesign Replace file libraries/joomla/cache/storage/file.php in your Joomla 3.7.0 by the one from #15592 , then clear browser cache and test again. The problem should be solved. With the 3.7.1 release coming sooner or later, this file will overvwritten then by the version from the release, which also will contain the corrections of #15592 because that is already committed. You can download that file by going to https://github.com/joomla/joomla-cms/pull/15592/files m click the "View" button beside the link to this file, and then in the single file view click the "Raw" button to see the file as it is without any GitHub stuff. Then you save the page in your browser, then you upload this file to the desired path libraries/joomla/cache/storage/file.php.

Perfect! Thank you so much.

@madesign Can you test if it works and report the result back here?

I tested it here on my "playground" site http://fuse.linatango.com with Page Cache plugin activated.
PHP 7.1.2
Joomla! 3.7.0 Stable
The file resolves so far the issue.

@madesign Btw. I am not sure if it is a good idea to post your phone number as frankly as you did in the desciption of this issue here. There are bots in web collecting numbers and selling them to aggressive marketing guys or even criminals, so don't be surprised when you get many phone calls by people who want to tell you you have won a million in a game which you never joined, but before you get the million you have to send some 50 000 bucks to an account in nigeria or so ;-)

@madesign Ah, and if the problem is really solved you can close this issue here.

The number is for years public on my website. I got 2 or 3 times a call from some foreign companies. Was more amusing then dangerous but thank's for warning.
Yes it resolves the problem. Only i had to copy the content of the site instead of downloading. But maybe a Safari issue.

Thank's a lot for the really fast help here.

I replaced on all sites where i noticed the problem the cache file and it resolves on all sites the Page Cache Plugin problem!

@franz-wohlkoenig Can you close this issue here? It is resolved, see discussion above.

Set to "closed" on behalf of @franz-wohlkoenig by The JTracker Application at issues.joomla.org/joomla-cms/15691

closed as Issue resolved.

Thank you all for the help!