Skript Errors

[10:42:21] [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!
[10:42:22] [Thread-18/INFO]: [Skript] Loaded 18493 variables so far...
[10:42:23] [Server thread/INFO]: [Skript] Loaded 57409 variables in 2.3 seconds
[10:42:25] [Server thread/ERROR]: [Skript] Can't understand this condition/effect: delete {_word::%size of {_word::*}%} (adminShop.sk, line 136: delete {_word::%size of {_word::*}%}')
[10:42:28] [Server thread/ERROR]: [Skript] '::*} at loop-value-2 with duration 1' is not a valid item data (dropParty.sk, line 98: launch random element out of {_types::*} firework colored random element out of {_colors::*} at loop-value-2 with duration 1')
[10:42:28] [Server thread/ERROR]: [Skript] '::*} at loop-value-2 with duration 1' is not a valid item data (dropParty.sk, line 100: launch random element out of {_effects::*} random element out of {_types::*} firework color random element out of {_colors::*} at loop-value-2 with duration 1')
[10:42:29] [Server thread/ERROR]: [Skript] '::*} at loop-value-2 with duration 1' is not a valid item data (dropParty.sk, line 103: launch random element out of {_types::*} firework colored random element out of {_colors::*} fade to random element out of {_colors::*} at loop-value-2 with duration 1')
[10:42:29] [Server thread/ERROR]: [Skript] '::*} at loop-value-2 with duration 1' is not a valid item data (dropParty.sk, line 105: launch random element out of {_effects::*} random element out of {_types::*} firework color random element out of {_colors::*} fade to random element out of {_colors::*} at loop-value-2 with duration 1')
[10:42:36] [Server thread/WARN]: [Skript] a money cannot be saved, i.e. the contents of the variable {synced_balance::%the player%} will be lost when the server stops. (miscCommands.sk, line 35: set {synced_balance::%player%} to player's balance')
[10:42:36] [Server thread/WARN]: [Skript] a money cannot be saved, i.e. the contents of the variable {synced_balance::%the player%} will be lost when the server stops. (miscCommands.sk, line 90: set {synced_balance::%player%} to player's balance')
[10:42:37] [Server thread/ERROR]: [Skript] There are multiple loops that match loop-index. Use loop-index-1/2/3/etc. to specify which loop's value you want. (parkour.sk, line 331: set line 1 of block at loop-index-2 to "<yellow>[RandomParkour]"')
[10:42:37] [Server thread/ERROR]: [Skript] There are multiple loops that match loop-index. Use loop-index-1/2/3/etc. to specify which loop's value you want. (parkour.sk, line 336: set line 2 of block at loop-index-2 to "<gold>First Place"')
[10:42:37] [Server thread/ERROR]: [Skript] There are multiple loops that match loop-index. Use loop-index-1/2/3/etc. to specify which loop's value you want. (parkour.sk, line 337: set line 3 of block at loop-index-2 to "<white>%{_1name}%"')
[10:42:37] [Server thread/ERROR]: [Skript] There are multiple loops that match loop-index. Use loop-index-1/2/3/etc. to specify which loop's value you want. (parkour.sk, line 338: set line 4 of block at loop-index-2 to "%{_1}% blocks"')
[10:42:42] [Server thread/INFO]: [Skript] Loaded 57 scripts with a total of 182 triggers and 199 commands in 18.96 seconds
[10:42:42] [Server thread/INFO]: [Skript] Finished loading.