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Error : TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, null given

Backtrace:
/modules/tadgallery/index.php (9)

Errors
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $isAdmin in file /modules/tadgallery/function.php line 365
Warning: Undefined variable $ok_cat in file /modules/tadgallery/function.php line 378
Error: TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, null given in file /modules/tadgallery/header.php line 15

Deprecated

Queries
0.000109 - SET SQL_BIG_SELECTS = 1
0.000439 - SELECT * FROM config WHERE (`conf_modid` = '0' AND `conf_catid` = '1') ORDER BY conf_order ASC
0.000184 - SELECT sess_data, sess_ip FROM session WHERE sess_id = '51i8ph4h2g583beki9m1fc0qq2'
0.000230 - SELECT * FROM modules WHERE dirname = 'tadgallery'
0.000379 - SELECT COUNT(*) FROM group_permission WHERE (`gperm_modid` = '1' AND (`gperm_groupid` = '3') AND `gperm_name` = 'module_read' AND `gperm_itemid` = '23')
0.000260 - SELECT * FROM config WHERE (`conf_modid` = '23') ORDER BY conf_order ASC
0.000132 - DELETE FROM protector_access WHERE expire < UNIX_TIMESTAMP()
0.000167 - SELECT COUNT(*) FROM protector_access WHERE ip='3.23.101.60' AND request_uri='/modules/tadgallery/index.php?csn=27&g2p=2&loadtime=1550653991'
0.000120 - SELECT COUNT(*) FROM protector_access WHERE ip='3.23.101.60'
0.000130 - INSERT INTO protector_access SET ip='3.23.101.60', request_uri='/modules/tadgallery/index.php?csn=27&g2p=2&loadtime=1550653991', expire=UNIX_TIMESTAMP()+'60'
0.000156 - select csn,enable_upload_group from tad_gallery_cate
Total: 11

Blocks
Total: 0

Extra
Included files: 88 files
Memory usage: 923280 bytes

Timers
XOOPS took 0.034 seconds to load.
XOOPS Boot took 0.026 seconds to load.
Module init took 0.008 seconds to load.