Nevertheless police habits and procedures gained through the years gen.

[A111981]

Please help me translate this sentence

Nevertheless police habits and procedures gained through the years prevented from proper cooperation in minor challenges during the match (securing the ticket collection point, redirecting the crowd to other entrances or helping to decrease the black market around the stadium).

This part: Nevertheless police habits and procedures gained through the years prevented from proper cooperation in minor challenges during the match.

Thanks a lot in advance!

[silly.wizard]

подлежащее = habits and procedures
сказуемое = prevented

[Rivenhart]

а Ваш вариант можно увидеть?