Theres so much information to pry out from an unreadable message here. Assuming that message was intentionally sent, that means that
1. The foundation survives any and all end of the world events, basically rendering any timed end-of-the-world catastrophy nullified.
2. The foundation is in a situation serious enough to send a message to the back, hinting that theres a case deadly enough to warrant time travel to fix it.
3. The message was sent in a language that was not decipherable at that time. Why wasnt it sent any time when the new language was readable? Why didnt they keep a record of past languages to be able to send messages like these?
4. The message was not sent to the time the machine was actually created, when messages to the past could actually be sent.
From point 3 and 4,it could be assumed that the time frame it was sent to is important, and the foundation needs to make a change soon or else the future will come to pass. Also the encoded message means either the foundation was compromised and needed to encode the message, or the foundation in the future or even humankind has lost all knowledge of the past and adopted a new language, something that could happen due to scp2000.
Then watch as this message was just a shitpost by a D-boy after getting a black card