Conversation so far:
What was the Midsummer crisis connection with Gustaf V of Sweden?
According to Prime Minister Hansson during the Midsummer crisis, Gustaf V of Sweden in a private conversation had threatened to abdicate if the Government did not approve a German request.
Did Gustaf V of Sweden abdicate if the Government did not approve a German request to transfer a fighting infantry division?
The event has later received considerable attention from Swedish historians and is known as midsommarkrisen, the Midsummer Crisis.
What else happened with the Midsummer crisis and its connection with Gustaf V of Sweden besides the alleged abdication?
On 25 June 1941, the German Minister in Stockholm sent a Most Urgent-Top Secret message to Berlin.

Question: what was the message
Self-contained rewrite: What did the Most Urgent-Top Secret message entail?