You really need to take care about your supplies income! – With Lighthouse of Alexandra (As adviced by Emberguard) and at higher level parhaps adding the Royal Albert Hall it is certainly possible to keep the Supplies coming. Coins, Supplies and Goods are the backbone for nearly everything else you do in FoE
You must make sure that these essentials are coming in a rate that keeps adding to your stock. In general you balance should have about double the amount of Coins vs Supplies, still meaning that you should have enough supplies for quests and events. And sorry, but 44.000 Supplies is really not very much, even in like EMA. I started a new small town in August 2018, I do not even have the LOA and my Supplies are in millions in EMA.
When you have solved your current challenge, then start making 8 hour supply productions mandatory to build up some leverage. Supply requests are not going to get less as you progress – on the contrary they will graduately become higher and higher.
Your Goods should overmatch what you current goal is. Let´s say you want to Tech into a new Era - then you need to Plan in advance.
Every tech tree has some "milestones" that should be reached as fast as possible when teching. Some Era´s have great houses, great Supply buildings or great Units. You need to check this in advance so that you have what you need of Goods, Supplies and Coins to advance fast or risk stalling as has happned to you now.
Also it is never adviced to tech at the same time as an event is running – unless you are already bolstered to do so – In lower Eras´s that is usually not the case for most players.
Emberguard already ponted it out – If you are facing a baseplay problem like Supllies, get moving to solve it by chaning the way you play.
– It is a real classic but severe mistake to run out of Supplies – because it can also make it very difficult to fast build some supply buildings, since they also costs supplies. That is the reason that you should never ever run out of Supplies or Coins ever again.