Please, I need your help with the following:
I found this post on social media of a gym talking about their recent reopening (due to the COVID-19 pandemic) and classes:
"Whether it's indoors, outdoors, or virtually - the writing is on the walls."
From what I understood, after doing some research, "the writing is on the walls" is an expression with a negative connotation, but I'm still going through a hard time to understand its meaning in this sentence. Could anyone help me?
I really appreciate your help.