By Tom Gott Former Manchester United manager Louis van Gaal has urged the Red Devils to stand by current boss Erik ten Hag. Club officials are currently in the process of conducting a post-season review, which will include a decision on the future of Ten Hag. The manager is under immense pressure after a bitterly disappointing campaign but earned some support back with a surprise FA Cup triumph over Manchester City. Van Gaal, who was sacked in 2016 just days after leading the team to FA Cup glory, admitted Ten Hag’s tenure has not been perfect but insisted the 54-year-old deserves more time. A…