[Koha] INTERNAL SYSTEM ERROR

[Shafendi]

here is my afew lines of my plack-error log.

DBD::mysql::st execute failed: MySQL server has gone away [for Statement
"SELECT `me`.`variable`, `me`.`value`, `me`.`options`, `me`.`explanation`,
`me`.`type` FROM `systempreferences` `me` WHERE ( `me`.`variable` = ? )"
with ParamValues: 0='template'] at
/usr/share/perl5/DBIx/Class/Storage/DBI.pm line 1836.
DBD::mysql::st execute failed: Table 'koha_kplh.language_descriptions'
doesn't exist [for Statement "SELECT description FROM language_descriptions
WHERE subtag=? AND lang=? AND type=?" with ParamValues: 0='en', 1='en',
2='language'] at /usr/share/koha/lib/C4/Languages.pm line 383.
DBD::mysql::st fetchrow_hashref failed: fetch() without execute() [for
Statement "SELECT description FROM language_descriptions WHERE subtag=? AND
lang=? AND type=?" with ParamValues: 0='en', 1='en', 2='language'] at
/usr/share/koha/lib/C4/Languages.pm line 384.
DBD::mysql::st execute failed: Table 'koha_kplh.language_descriptions'
doesn't exist [for Statement "SELECT description FROM language_descriptions
WHERE subtag=? AND lang=? AND type=?" with ParamValues: 0='en', 1='en',
2='language'] at /usr/share/koha/lib/C4/Languages.pm line 389.
DBD::mysql::st fetchrow_hashref failed: fetch() without execute() [for
Statement "SELECT description FROM language_descriptions WHERE subtag=? AND
lang=? AND type=?" with ParamValues: 0='en', 1='en', 2='language'] at
/usr/share/koha/lib/C4/Languages.pm line 390.

i dont understand..




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