Hey, there!
Sorry for the trouble. That’s an odd one. A quick Google suggests turning off any caching you might have, and reinstalling the plugin.
Here were the articles I found:
https://ww.wp.xz.cn/support/topic/the-plugin-does-not-have-a-valid-header-136/
https://scotty-t.com/2011/03/28/fix-for-the-plugin-does-not-have-a-valid-header/
Hope that helps!
Thanks,
Corey
Thread Starter
ibsaic
(@ibsaic)
Hello,
much thanks for your quick replay.
Well I used the following steps as described in on the website: https://ww.wp.xz.cn/plugins/kanban/#installation
I used the step “go to Plugins > Add New > Upload Plugin” since it is listed in WordPress plugins on the admin page.
Also I tried now the method described in you second URL. No chance.
By the way I was able to install other plugins without any issues.
Any advice?
In advance much thanks for your cooperation and reply.
Best greetings,
Ibsaic
The only other thing I can think of is ftp’ing the files directly and clearing any caching you might have. As I’ve not encountered this bug before, I’m afraid I don’t have any other ideas. :-\
Thanks,
Corey
Thread Starter
ibsaic
(@ibsaic)
Hello,
much thanks for your reply.
Good news: the problem solved.
What I did is I installed the version 3.0 Beta. First I had the same problem.
Then I updated the plugin. It worked and no issue.
I have no idea how comes and why, but I am happy to get the problem solved and now I can enjoy testing your product. If it has what I need, I will buy the pro version.
Once again much thanks for your great support.
Cheers,
Ibsaic
Great! Thanks for your diligence, and letting me know it’s fixed.
Corey
