Database error using phpMyAdmin

Hi Friends,
using Nextcloud 20.0.12, and trying to access to its database from phpMyAdmin 4.6.6, I get the following errors:


**Notice** in ./index.php#312
![](https://server.3x1t.org/phpmyadmin/themes/dot.gif) Undefined index: utf8

Then, again entering into single table:

Warning in ./libraries/sql.lib.php#613
count(): Parameter must be an array or an object that implements Countable

Backtrace

./libraries/sql.lib.php#2128: PMA_isRememberSortingOrder(array)
./libraries/sql.lib.php#2062: PMA_executeQueryAndGetQueryResponse(
array,
boolean true,
string 'next68cl_3x',
string 'oc_polls_share',
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
string '',
string './themes/pmahomme/img/',
NULL,
NULL,
NULL,
string 'SELECT * FROM `oc_polls_share`',
NULL,
NULL,
)
./sql.php#221: PMA_executeQueryAndSendQueryResponse(
array,
boolean true,
string 'next68cl_3x',
string 'oc_polls_share',
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
string '',
string './themes/pmahomme/img/',
NULL,
NULL,
NULL,
string 'SELECT * FROM `oc_polls_share`',
NULL,
NULL,
)

Has this already happened to you? Do you have any suggestions?

Many Thanks!