Update from 17.0.3 to 18.0.1 failed with webupdate facilty - white screen

🚧 Installation
1

Hello,
i tried to update from 17.0.3 to 18.0.1 with the webupdate facility. The first steps were succesful. I then had to select either console and webupdate. After clicking the option for webupdate I got a blank white screen in my brother and nothing happened any more. If I call my nextcloud from an other browser i alo get a white screen. The maitenance mode in config.php is set to false. I set it to true, then I got the normal blue Maintenance mode screen. Setting it back to false resulted again in a white screen. I found a "CAN INSTALL " 0 byte file in the config directory.
Any ideas how to go on?
Regards
Bernd

2

Bump ! Same issue here…

3

I succeeded in getting my Nextcloud instance to work again by running in the following command

sudo -u www-data php occ upgrade
(from your nextcloud folder)

I was then faced with some non critical and easy to solve errors in the settings page.

4

Hi, Can you tell me if you have access to the Applications and Users page? Because personally after upgrading to version 18.0.1 I have nothing left on these pages. Thank you
My post https://help.nextcloud.com/t/mise-a-jour-17-0-3-vers-18-0-1-applications-et-utilisateurs-absents

5

I had no access to any nextcloud (simple a white page in Firefox). In Edge I got a http error 500 message. Now I am going to over install the old nextcloud files with the new 18.0.1 via FTP. I hope this will work. I have no access to a console, as I use a webhosting environment.

6

disable app by app and try again

7

My message above solved the issue (if you have ssh access - command line terminal)

8

I just managed to get nextcloud working again by finishing the FTP approach. After changing all the old files (except those in /data and /config) to the 18.0.1 files I was able to log in and the update process contiuned where it stopped before.
I hope this will not happen again as it costs me 3 hours working time.
I personally would regard this as a work around not as a real “solution”.

9

I disabled all apps and didn’t have white screen anymore. After update was done enabled all apps back and this way was fastest upgrade with eliminating white screen.

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