ErrorException: "Undefined index: Steve" (EXCEPTION) in "essentialsTP.phar/src/essentialsTP/essentialsTP" at line 1084

[totor29]

Hi,

critical error exception
thanks for your job

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17-07-30 [14:24:30] �[Server thread/CRITICAL]: Unhandled exception executing command 'back' in back: Undefined index: Steve�
2017-07-30 [14:24:30] �[Server thread/CRITICAL]: ErrorException: "Undefined index: Steve" (EXCEPTION) in "essentialsTP.phar/src/essentialsTP/essentialsTP" at line 1084�

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Version essentialTP : Dev | #7 essentialsTP 1.1.1-dev3
PocketMine : Version: | 1.6.2dev-319
PHP version: | 7.0.17
Linux ns3023271.ip-151-80-230.eu 4.4.19-mod-std-ipv6-64 #1 SMP Mon Aug 22 13:05:01 CEST 2016 x86_64