Rangers will raise the issue of the no goal decision in the match against Hibernian with the Scottish FA.
Officials have been left furious after Nico Raskin was not awarded a goal against Hibs after the ball appeared to cross the line before being cleared by Rocky Bushiri.
TV angles of the incident appear to show the ball over the goalline before it was hooked clear. Hibs then scored an equaliser in the Scottish Premiership tie.
Rangers have now issued a statement over the incident.
A Rangers spokesperson said: "Incidents like this again bring into question the effectiveness of VAR and also highlight the need to introduce goal-line technology in Scottish football.
“Our supporters, players and staff deserve better. We will raise this with the Scottish FA and continue to press for initiatives which improve the accuracy of decision-making."
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"Baffling," Ferguson said when asked about the decision.
“I don’t want to get myself in trouble, but it was baffling. That’s all I can say. I saw it when it happened, watched it at half-time and at the end."
Asked if he'd consult Walsh for an explanation, he added: "What’s the point? Nick won’t speak. The fourth official was brand new but the referee wasn’t interested.
"It should be getting checked by VAR, that’s why we have it. It’s clearly over the line, so it was disappointing. But I’ve seen it all season, decisions like that. Not just with Rangers, in other games that I watch.
“That was mind-blowing today. It’s another reason why we need goalline technology. But you don’t need technology for that incident. It’s clear to see it’s over the line. It’s got to be up there with the worst I’ve seen."
The BBC reports no goal was awarded due to no conclusive angle to confirm the ball was over the line.
