To piggy back off of your comment, I absolutely agree. If you’re burnt out, which is what it sounds like, powering through isn’t going to allow you to finish with the best version of your game. When you lack the will or creativity to do something, you aren’t going to give it your best. So if you aren’t able to do that right now, that’s ok. as Panda said there’s no shame in taking a break from it. In fact it’s necessary to learn how to properly balance game development for the long term.
For me I’ve handled it by bouncing between different disciplines in my project. I may be working on character blueprints and combat for a couple weeks, then I’ll switch over to something art related like environment or character design - but not in engine. This is important, you want to create as much distance as you can from what it is you were previously doing while still making good progress on your project. So for me rather than do environment work in UE4, I would for example switch to Maya and start working on architecture and props for a while. That would change my daily operations from UE4 to Maya/Marmoset/Photoshop/Quixel/Substance for a while. Couple weeks doing that, I switch it up again. Preferably something that requires me to do work in the engine, so I could work on particles, or perhaps UI, etc.
Handling my development like this has allowed me to significantly reduce burnout. I even bounce back and forth between UE4 Marketplace work to change things up stylistically as well, because creatively working in the same genre non stop can also lead to a block. My game is more sci/fantasy where my MP work is hard scifi. I’ve had periods where I’d take a week or so off of game development to work strictly on the MP, and then when I come back I’m more than ready to tackle the project.
It’s also important to continue professional development. Don’t wait until your project is done to learn, learn as you go! Keep pushing your boundaries and you’ll pick up on things that will not only increase your overall knowledge, but also help you to become efficient in your workflow. Maybe take a day out of your week to devote entirely to learning something new in UE4. There are many great tutorials out there on Youtube, one channel by Matthew Wadstein is a resource I’ve always found myself coming across whenever I may have a question or seek to learn how to do something regarding Blueprints.
Whatever you decide though, best of luck to you. =)