error with 1.8

[23:03:55] [Server thread/WARN]: [Skript] Empty configuration section! You might want to indent one or more of the subsequent lines to make them belong to this section or remove the colon at the end of the line if you don't want this line to start a section. (Mobs+.sk, line 82: chance of 40%:')
[23:03:55] [Server thread/WARN]: [Skript] Empty configuration section! You might want to indent one or more of the subsequent lines to make them belong to this section or remove the colon at the end of the line if you don't want this line to start a section. (Mobs+.sk, line 84: chance of 40%:')
[23:03:55] [Server thread/WARN]: [Skript] Empty configuration section! You might want to indent one or more of the subsequent lines to make them belong to this section or remove the colon at the end of the line if you don't want this line to start a section. (Mobs+.sk, line 109: chance of 40%:')
[23:03:55] [Server thread/WARN]: [Skript] Empty configuration section! You might want to indent one or more of the subsequent lines to make them belong to this section or remove the colon at the end of the line if you don't want this line to start a section. (Mobs+.sk, line 111: chance of 40%:')
[23:03:55] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 8: set spawned skeleton's max health to 50')
[23:03:55] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 38: set event-entity's max health to 50')
[23:03:55] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 62: set event-entity's max health to 50')
[23:03:55] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 71: set event-entity's max health to 80')
[23:03:55] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 91: set event-entity's max health to 120')
[23:03:56] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 118: set event-entity's max health to 10')
[23:03:56] [Skript update thread/INFO]: [Skript] You're currently running a beta version of Skript, and no new stable version is available. Please note that you have to update to newer beta versions manually!
[23:03:56] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 136: set event-entity's max health to 20')
[23:03:56] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 141: set event-entity's max health to 20')
[23:03:56] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 146: set event-entity's max health to 30')
[23:03:56] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 151: set event-entity's max health to 20')
[23:03:56] [Server thread/ERROR]: [Skript] can't understand this event: 'on spawn of wither skeleton' (Mobs+.sk, line 202: on spawn of wither skeleton:')
[23:03:56] [Server thread/ERROR]: [Skript] can't understand this event: 'on spawn of wither skeleton' (Mobs+.sk, line 219: on spawn of wither skeleton:')
[23:03:56] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 235: set spawned creeper's max health to 25')
[23:03:56] [Server thread/ERROR]: [Skript] The max health of an entity can only be changed in Minecraft 1.6 and later (Mobs+.sk, line 241: set spawned entity's max health to 25')
[23:03:57] [Server thread/ERROR]: [Skript] Can't compare an entity with a types.particletype (essai.sk, line 41: if attacker is Slime:')
[23:03:58] [Server thread/ERROR]: [Skript] Can't understand this condition/effect: display "&6&o%argument 1%" on bossbar with 100 percent by 30 seconds for loop-player (pub.sk, line 18: display "&6&o%argument 1%" on bossbar with 100 percent by 30 seconds for loop-player')