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Sometimes, I get this error (it repeats several times at top screen):

[phpBB Debug] PHP Warning: in file [ROOT]/ext/rmcgirr83/nationalflags/event/listener.php on line 579: in_array() expects parameter 2 to be array, null given
[phpBB Debug] PHP Warning: in file [ROOT]/ext/rmcgirr83/nationalflags/event/listener.php on line 579: array_keys() expects parameter 1 to be array, boolean given

Usually, pressing F5 will solve it.

I didnt have this error in 2.1.3.

null2 wrote:Sometimes, I get this error (it repeats several times at top screen):

[phpBB Debug] PHP Warning: in file [ROOT]/ext/rmcgirr83/nationalflags/event/listener.php on line 579: in_array() expects parameter 2 to be array, null given

means the cache for the users and flags isn't being generated.

Try this fix to that file

https://github.com/rmcgirr83/phpBB-3.1- ... ick_pull=1

Doing that, I got an error 500 and blank screen.

Then you didn't do the edit correctly.

I think you were right. Now, its in test. I will let you know if it removed the bug.

No problems anymore. I think its solved. Thank you!

Same error today:

[phpBB Debug] PHP Warning: in file [ROOT]/ext/rmcgirr83/nationalflags/event/listener.php on line 581: in_array() expects parameter 2 to be array, null given
[phpBB Debug] PHP Warning: in file [ROOT]/ext/rmcgirr83/nationalflags/event/listener.php on line 581: array_keys() expects parameter 1 to be array, boolean given

It happened after I changed board language to English. After a F5, error disapeared.

Sorry, I'm not sure why that's happening. Can you paste in the data within the data_users_and_flags php file (not the lock file) found in the cache directory?

Download it here: https://www.sendspace.com/file/ehnlcm

Your cache file is 2.5 MB's?!!!

How many users are on your forum and have chosen a flag?

Right now, 220718 registered users. I believe 95+% of them set a flag.

My forum had more than 1,000,000 users but in December I made a cleaning to remove old ones. I left these ones who signed up once, at least, in the last 2 years.

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IN TIME: Error happened again today, but in line 601, just browsing forum.

That is for viewing the memberlist. I'm not sure why this is occuring but may have some suggestions for you to try.

It happened in version 2.1.4. In version 2.1.3 was ok.

I couldnt find a "logic reason" for these errors. They look like random.

One more time today: https://s10.postimg.org/3up93vjtl/tela.jpg

I will return to version 2.1.3 for a while.

Well I would still like to figure out why this is happening.

Can you paste this sql command within phpmyadmin (CTRL + V if right click doesn't display paste command) and tell me how long the query takes to run and how many rows were returned
you may need to change phpbb to be the proper prefix of the table in your database.