It’s still very much safe to consume.
"When stored in a cool, dry place Soylent products will have a shelf life of at least 1 year from their manufacturing date. All products are marked with either an expiration date (EXP month/year), or manufacturing date (MFG month/year). This means that sometimes you may receive an order with an expiration date that is less than a year from when it was purchased.
The shelf life of Soylent products reflects the optimum nutrition they contain. About a year after production it is the vitamin blend that begins to lose its potency, so the reason we recommend consuming it within this time-frame is to get the most out of your Soylent."
Here’s a thread with more information: