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I have updated WordPress to version 6.2. I have updated all the plugins and it still does not work

I don’t know what else to do… Can anyone help me?

I have translated my entire site from English to Portuguese a while ago and last week some of the pages dont switch to Portuguese anymore when I use the language flag button at the bottom of the page.

Can anyone tell me how to resolve this?

Thanks a bunch!!

[vrm360 canvas_name=s1 model_url=https://sketchfab.com/3d-models/109596737-cc68f0c3356242338b5d00cea36286d2
aspect_ratio=1.33333 hide_cmds=zoom,fullscreen]

[vrm360 canvas_name=3d-models/109596737-db670a7cf8ee480d9fc1852191c321c3]

please help me: I want to setup it this link: https://sketchfab.com/3d-models/109596737-cc68f0c3356242338b5d00cea36286d2

and: https://sketchfab.com/3d-models/115411428-94c667559fba4d19bb82b402d105b46b

Please anyone do the solve.

I accidentally deleted the extension. Is it possible to get back everything I had before ?

So my question is : do you any plugin/way to have a (free) reservation page/website using any plugin/other? with 5 periods (could be simulated as days like I’ve tried to hack a few plugins) and ~ 60 + 30 + 20 content available (for borrowing free) (so 5 times ~ 110), with people needing to enter their school name, personal name, phone number and email adress so we can contact them (elsewise many won’t be brought back in time). (we also have books but we removed them from the current system because it would be too much work)

If it’s not clear enough (I would totally understand it), don’t hesitate to ask me questions. For example, our current reservation sheet : https://docs.google.com/spreadsheets/d/130nR907w9slZPf0U9z82kms-wbedTXFtB86iYQBc5Tk/edit?usp=sharing (in french :/)

Sorry for my english :/
Thanks for reading and best regards from France,
Thomas D
AED Centre Pilote 46
La Main A La Pate

Warning: mysqli_query(): MySQL server has gone away in /var/www/wp-includes/wp-db.php on line 2056

Warning: mysqli_query(): Error reading result set’s header in /var/www/wp-includes/wp-db.php on line 2056

I have already tried everything I could find in this forum and nothing worked.

Here is the line 2056 in bold:

private function _do_query( $query ) {
if ( defined( ‘SAVEQUERIES’ ) && SAVEQUERIES ) {
$this->timer_start();
}

if ( ! empty( $this->dbh ) && $this->use_mysqli ) {
$this->result = mysqli_query( $this->dbh, $query );
} elseif ( ! empty( $this->dbh ) ) {
$this->result = mysql_query( $query, $this->dbh );
}
$this->num_queries++;

if ( defined( ‘SAVEQUERIES’ ) && SAVEQUERIES ) {
$this->log_query(
$query,
$this->timer_stop(),
$this->get_caller(),
$this->time_start,
array()
);
}
}

I didn’t change anything with my website, but all of a sudden, this message appears. I am so frustrated and sad.