Not enough host controller resources for new device state

Hi, I have a Unielec u7621-06 router with OpenWRT 19.07.0 installed and v4.14.156 kernel installed. To my router I connect active 7-ports Unitek Y-2183 USB hub (with external power supply) via the front USB 3.0 connector or internal MiniPICe with adapter to USB connector. I connect to the USB hub: pendrive, disk ssd, SimCOM 7600E-H, 2x Huawei E3372h and 2x Ericsson F5321.

From the system log, he receives errors that make my devices not work in OpenWRT: kernel:   [  473.707550] usb 1-2.4.1: new high-speed USB device number 15 using xhci-mtk
kern.warn kernel: [  473.851836] usb 1-2.4.1: Not enough host controller resources for new device state.
kern.err kernel:    [  473.859737] usb 1-2.4.1: can't set config #1, error -12

why? Isn't one lte modem not enough?

No. I need several modems with different mobile operators.

Can anyone help me?
I need your help to complete my multiwan project

I think this means that no more bandwidth can be allocated on the single USB2 link in and out of the router. Maybe it would work if you use a USB3 hub thus opening that bottleneck.

But what you are trying to do is not any conventional use case.

To my first post I wanted to add that the set consisting of a 7-port USB 2.0 hub and a pendrive, disk SSD, SimCOM 7600E-H, 2x Huawei E3372h and 2x Ericsson F5321 worked correctly connected to port usb 2.0 in the other router Unielec u7628-01.

If I understood your message correctly - I used now the usb 3.0 port in the Unielec router u7621-06 and the usb 3.0 hub. I connect devices to the USB 3.0 hub one by one: the first Huawei E3372h, the second Huawei E3372h, the third Ericsson F5321 - everything works fine until then. Connecting the fourth device as Ericsson F5321 return the previously mentioned error.

I don't understand why my usb devices set works properly on u7628-01, but can't work on u7621-06.