it won't look great, but it should stop the flickering if you replace just one of the lights with a regular bulb. It can hold you over till you get a more permanent solution.
just having a "real load" on the dimmer helps the dimmer to figure out what it's doing.
they make small things called "load resistors" that get wired into the switch, and do the same function as that single bulb.
here's one I found, quick search, you might want to research more -
https://www.amazon.com/PCS-Load-Resistor-Lighting-ILR-10K/dp/B01ES0AYU8
when it says "wired in parallel" it means don't wire it so the lights are running though the module, it should be like both the module and the lights are plugged into the switch.
Load
--- module
--- lights
neutral
--- module
-- lights
Not
Load
--- module --- lights
neutral
--- lights
I work in theatre (not so much at the moment) at this time of year I'm usually dealing with large amounts of Christmas lights, which are all LED now. We place what we call a "ghost load" somewhere out of view of the audience. It's typically just a plug with a couple sockets hanging out the back which we put 10 watt bulbs in. it's got 2, so if one burns out, the other can still do what it's supposed to do.
here's a link with a little more info as to why it works
Is using a LED dummy load or incandescent or load resistor a good fix for LED dimming problems? It depends on the type of controls or dimmer switches.
insights.regencylighting.com